#1 Cobalt Stubby Threaded Shank Drill Bit - High Performance & Durable Cutting Tool | Drill America
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Threaded shank drill bits are type D adapter style. They are made from M42 8% cobalt and are manufactured to NAS 965 Type "D" specifications. They have 135º heavy duty split point and surface treated for drilling hard, tough, high tensile strength materials. When drilling low tensile strength materials, the Type "D" cobalt drill will have a significantly greater tool life than the NAS 965 Type B high speed steel adapter drill, resulting in a much lower cost per hole.
Product Specifications:
- Size: #1
- Material: Cobalt
- Finish: Black Oxide
- Flute Length: 5/16"
- Overall Length: 5/8"
- Point: Split Point
Key Features:
- Type D Adapter Drill Bit manufactured to NAS 965 Type "D" specifications
- 1/4"-28 threaded shank
- Cobalt drill bits are are effective in drilling tough, high tensile strength materials
- Display high red hardness, permitting speeds up to 30% greater than with conventional M2 high speed steel
- 135° split point tip for fast penetration and accurate drilling
Why settle for less? Upgrade your toolkit today with this premium tool, trusted by professionals for its superior durability and performance. Order now and experience the difference!

#1 Cobalt Stubby Threaded Shank Drill Bit - High Performance & Durable Cutting Tool | Drill America
Regular price
$4.34
Sale price
$4.34
Regular price
Unit price